Like combining Flair-or-tag-Text with some formatting? (I thought I saw that once, maybe it was in an app?)
For flairs a possible workaround could be to encourage Lemmy posters in PieFed-Communities to include info what flair they’d want. Mods then could add them (or add them on a regular base, and communicate that). For tags there’s probably no better workaround than adding #s to the body, so that they can be found via community searchbar.
IIRC Lemmy 1.0 will bring some changes in that regard, so compatibility should increase.
Thank you very much for your answer! Maybe it was Photon then. Since it’s limited to some frontends and only a lookalike without the same functionality as Piefed’s flairs, I rather not confuse anybody with that.